Patents by Inventor Herbert Grolla

Herbert Grolla has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 6460605
    Abstract: A casting process for casting, in particular of sand molds provided with casting boxes, which makes it possible to keep the apparatus expense low, to save cycle material and to achieve an improved quality, consists of the intake channel extending in a plane lying essentially horizontally during casting and being provided with a bearing surface defining its port, onto which bearing surface can be sealingly positioned a fill pipeline through which the mold can be filled with metal under low pressure. A casting system to carry out the method consists of a casting machine with a pressure kettle and a fill pipeline which is connected to the intake channel lying essentially in a horizontal plane, whereby the sealed coupling of fill pipeline and intake channel is obtained through specified bearing pressure.
    Type: Grant
    Filed: April 21, 2000
    Date of Patent: October 8, 2002
    Assignee: Heinrich Wagner Sinto Maschinenfabrik GmbH
    Inventor: Herbert Grolla
  • Patent number: 6453978
    Abstract: A casting process for casting, in particular of sand molds provided with casting boxes, which makes it possible to keep the apparatus expense low, to save cycle material and to achieve an improved quality, consists of the intake channel extending in a plane lying essentially horizontally during casting and being provided with a bearing surface defining its port, onto which bearing surface can be sealingly positioned a fill pipeline through which the mold can be filled with metal under low pressure. A casting system to carry out the method consists of a casting machine with a pressure kettle and a fill pipeline which is connected to the intake channel lying essentially in a horizontal plane, whereby the sealed coupling of fill pipeline and intake channel is obtained through specified bearing pressure.
    Type: Grant
    Filed: November 2, 2001
    Date of Patent: September 24, 2002
    Assignee: Heinrich Wagner Sinto Maschinenfabrik GmbH
    Inventor: Herbert Grolla
  • Patent number: 6382301
    Abstract: In order to increase casting production during a filling of a mold from below, an uptake for the casting mass is provided in molding sand of the mold. Immediately after the filling of the mold has been concluded, a part of the uptake which extends in the molding sand is interrupted and thus closed off so that the mold can be immediately separated from the casting container.
    Type: Grant
    Filed: June 23, 2000
    Date of Patent: May 7, 2002
    Assignee: Heinrich Wagner Sinto Maschinenfabrik GmbH
    Inventor: Herbert Grolla
  • Publication number: 20020036072
    Abstract: A casting process for casting, in particular of sand molds provided with casting boxes, which makes it possible to keep the apparatus expense low, to save cycle material and to achieve an improved quality, consists of the intake channel extending in a plane lying essentially horizontally during casting and being provided with a bearing surface defining its port, onto which bearing surface can be sealingly positioned a fill pipeline through which the mold can be filled with metal under low pressure. A casting system to carry out the method consists of a casting machine with a pressure kettle and a fill pipeline which is connected to the intake channel lying essentially in a horizontal plane, whereby the sealed coupling of fill pipeline and intake channel is obtained through specified bearing pressure.
    Type: Application
    Filed: November 2, 2001
    Publication date: March 28, 2002
    Applicant: Heinrich Wagner Sinto Maschinenfabrik GmbH
    Inventor: Herbert Grolla
  • Patent number: 6305460
    Abstract: In order to increase casting production during a filling of a mold from below, whereby an uptake for the casting mass is provided in the molding sand of the mold, immediately after the filling of the mold has been concluded a part of the uptake, which part extends in the molding sand, is interrupted and thus closed off so that the mold can be immediately separated from the casting container.
    Type: Grant
    Filed: December 21, 1998
    Date of Patent: October 23, 2001
    Assignee: Heinrich Wagner Sinto Maschinenfabrik GmbH
    Inventor: Herbert Grolla
  • Patent number: 6244328
    Abstract: Flask-bound molds include two molding-flask halves, which have means (15) for the transport thereof on automatic mold systems. The molding flask receives a bound sand mold (8), which has cores (13), a pouring funnel (6) and a feeder passage (9). In order to be able to cast complicated castings also out of aluminum in such molds and to avoid the expensive finish work for the feeder and pouring funnel and in order to guarantee at the same time good core ventilation, the molding flask (4) has in the area of its parting plane a recess extending over at least a portion of the length and width of one side of the molding flask, whereby the pouring funnel (6) and the feeder (9) end in the area of the recess and the feeder is constructed within the sand mold (8) of the mold (1).
    Type: Grant
    Filed: February 23, 1999
    Date of Patent: June 12, 2001
    Assignee: Heinrich Wagner Sinto Maschinenfabrik GmbH
    Inventor: Herbert Grolla
  • Patent number: 5127816
    Abstract: A molding machine which includes a rotary-table system having at least two tables supported on the frame, which system has a lifting device in the area of each table, and a compressing device constructed on the frame.
    Type: Grant
    Filed: July 6, 1990
    Date of Patent: July 7, 1992
    Assignee: Heinrich Wagner Sinto Maschinenfabrik GmbH
    Inventor: Herbert Grolla
  • Patent number: 4036283
    Abstract: An improvement in a rail conveyor apparatus. The improvement is composed of a plurality of rail conveyor trucks coupled together and movably supported on a track with at least one foundry molding box being mounted on each rail conveyor truck. Each of the foundry molding boxes has a connector member thereon having first and second ends. A conduit connects the first ends of the connector members on each of the rail conveyor trucks. A vacuum source and another conduit is provided for coupling the vacuum source to a pair of coupling members. Valves are provided in the second-mentioned conduit for alternately connecting the coupling members to the vacuum source. Coupling devices are provided for effecting a coupling of at least one of the coupling members to the second end of one of the connector members on one of the conveyor trucks prior to an uncoupling of the other of the coupling members from the second end of another connector member on another rail conveyor truck.
    Type: Grant
    Filed: July 22, 1976
    Date of Patent: July 19, 1977
    Assignee: Heinrich Wagner Maschinenfabrik
    Inventor: Herbert Grolla
  • Patent number: 3970137
    Abstract: An apparatus for producing and transferring casting moulds utilizing binderless sand subjected to a reduced pressure. The apparatus is comprised of a travelling gripper which is arranged to be raised and lowered and which is provided with two couplings to hold a moulding box. The couplings are rotatable about a horizontally extending axis with one coupling being connected to a vacuum pipe for evacuating the moulding box.
    Type: Grant
    Filed: February 10, 1975
    Date of Patent: July 20, 1976
    Assignee: Heinrich Wagner Maschinenfabrik
    Inventor: Herbert Grolla
  • Patent number: 3970139
    Abstract: A vacuum control valving apparatus for a vacuum sealed molding apparatus. The control valving apparatus is located between a pair of mold members, one stacked upon the other, and a mating surface on a rail conveyor truck. The valving apparatus provides a controlled communication of a first vacuum source to an evacuation chamber on the mold members. The valving arrangement also effects a connection of the evacuation chambers on each of the mold members to a second vacuum source connection of the rail conveyor truck when the mold members are vertically stacked one on the other and in the appropriate location on the rail conveyor truck.
    Type: Grant
    Filed: January 6, 1975
    Date of Patent: July 20, 1976
    Assignee: Heinrich Wagner Maschinenfabrik
    Inventor: Herbert Grolla